47
7.
Plug a new power supply of the same model into the same slot, and connect it to the same power
input end. If the new power supply can work properly, the old power supply fails. Contact the
agents to replace the old power supply.
Fan failure
Both the MPU and the fan tray provide the fan tray LEDs, including an OK LED and a FAIL LED. When the
fan tray works properly, the OK LED is on, and the FAIL LED is off.
When the OK LED is off or the FAIL LED is on, the fan tray fails. To troubleshoot the fan tray:
1.
If both LEDs are off, check whether the power supply works properly. For more information, see
“
Power supply system failure
.”
2.
Check whether the air intakes and exhaust vents of the chassis are blocked. If they are blocked,
clean them to keep good ventilation.
3.
Check whether the fan tray is fully seated. You can unplug the fan tray, plug it again, and then fix
the screws.
4.
Check that the empty LPU slots and power supply slots are installed with blank panels. If not, install
blank panels for them to guarantee good ventilation.
5.
If the failure still exists, contact the local agents or technical support engineers.
MPU failure
The status LEDs on the MPU show the status of a card in the corresponding slot. According to the slot
number of an MPU, you can check the corresponding LEDs for the MPU.
When the MPU works properly, the RUN LED flashes, and the ALM LED is off. When the RUN LED is off,
the MPU fails. To troubleshoot the MPU:
1.
Check that the power supply works properly. For more information, see “
Power supply system
failure
.”
2.
Check whether the MPU is fully seated. You can unplug the MPU, plug it again, and make sure that
the MPU is fully seated.
3.
Press the RESET button of the MPU to reset the MPU. After the MPU is reset, check whether the
corresponding RUN LED is on.
4.
If the switch has empty MPU slots, plug the MPU into an empty MPU slot, and check that the MPU
can work properly.
5.
If the failure still exists, contact the local agents or technical support engineers.
LPU and switching fabric module failure
The status LEDs on the MPU show the status of a card in the corresponding slot. According to the slot
number of an LPU or switching fabric module, you can check the corresponding LEDs for the LPU or
switching fabric module.
When the card works properly, the RUN LED flashes, and the ALM LED is off. When the RUN LED is off,
the card fails. To troubleshoot the card:
1.
Check that the MPU works properly. For more information, see “
MPU failure
.”
